Docker Pixi Project Offline

Docker Pixi Project Offline

Prepare an existing Pixi-managed project for an air-gapped environment by:

1. building and verifying it inside a Docker container (with network access), and
2. producing a WORKDIR/product/ folder that can be packed and delivered.

This skill includes helper scripts under scripts/. Prefer using them (each supports --help) rather than retyping the manual steps.

What to ask the user

• Project source (pick one):
  • PROJECT_DIR: path to the Pixi project on the host (pixi.toml or pyproject.toml), or
  • PROJECT_PATH_IN_CONTAINER: path to the Pixi project already present inside a container
• VERIFY_SPEC: one of:
  • a concrete command to run under Pixi (e.g. python -m yourpkg --help)
  • a Pixi task name from the manifest (e.g. smoke)
  • a script path (e.g. ./scripts/smoke.sh) plus what counts as success
  • a short description of what “success” means (you convert it into one or more commands)
• Build execution target (pick one):
  • IMAGE: a Docker image that contains Pixi (recommended), or
  • CONTAINER_ID: an already-running container to use
• Optional RESOURCES_DIR: any extra runtime resources to bundle alongside the project (models, data files, binaries)
• Optional CONTAINER_WORKDIR_PATH: where the scripts stage files inside the container (use this if /workdir already exists or is reserved in the image/container)
• Optional WORKDIR (host output dir): where the scripts write the generated workdir on the host (default: <workspace>/tmp/workdir-<ts>)

Preconditions

• Build machine has Docker and internet access.
• Use the provided Docker image/container. If it can run the project offline once packaged, that’s sufficient.
• Pixi is available inside the container (prebuilt image, or installed during image build).
• Air-gapped runtime must also have Pixi available (the product does not include the Pixi binary).
• For reproducibility: pixi.lock exists and is up to date.

Outputs

• WORKDIR/: a self-contained workspace holding the staged project, resources, Pixi cache, and logs/test outputs.
• WORKDIR/product/: the deliverable directory (you pack and ship this folder; archiving is out of scope for this skill).

Workdir layout

Use a single work directory so “inputs + outputs” are easy to copy/inspect:

• WORKDIR/project/<project_name>/: staged project copy (input to product generation)
• WORKDIR/resources/: optional resources to include (input to product generation)
• WORKDIR/pixi-cache/: Pixi cache produced during the online build (input to product generation)
• WORKDIR/out/: logs and test outputs only
• WORKDIR/helpers/: helper scripts used during preparation (not shipped to air-gapped)
  • WORKDIR/helpers/make-archive-ready-product.sh: creates/overwrites WORKDIR/product/
• WORKDIR/product/: generated deliverable (created/overwritten by WORKDIR/helpers/make-archive-ready-product.sh)

Product layout (deliverable)

WORKDIR/product/ must be self-contained and include:

• WORKDIR/product/<project_name>/: project directory containing Pixi manifest (pixi.toml or pyproject.toml) and the minimal files needed to run
• WORKDIR/product/res/ (optional): binary data/resources required at runtime
• WORKDIR/product/pkg-cache/: Pixi package cache containing everything needed to install without internet
• WORKDIR/product/envs.sh: manual environment setup (users can source envs.sh before running Pixi commands)
• WORKDIR/product/bootstrap-project.sh: bootstraps the project (sources envs.sh then runs pixi install for <project_name>/ using pkg-cache/)

Process

0) Scripts

All scripts are in this skill directory:

• scripts/create-workdir-from-host.sh
• scripts/create-workdir-from-container.sh
• scripts/make-archive-ready-product.sh
• scripts/final-verify-product.sh

Each script is intended to be manually invokable and provides --help. The create-workdir-* scripts also copy scripts/make-archive-ready-product.sh into WORKDIR/helpers/ for portability.

1) Decide what “verification” means

Acceptable forms:

• Pixi task: smoke (run as pixi run smoke)
• Script: ./scripts/smoke.sh (define success: exit code 0, expected output, created files, etc.)
• Command: python -c "import yourpkg; print('ok')"
• Description: “Running the CLI help works and prints version” (convert into one or more commands)

When executing, capture output into WORKDIR/out/ so the workdir contains the proof.

2) Create WORKDIR/

Use exactly one of the following paths:

2a) From a host project dir (recommended)

This stages a filtered copy of the project into WORKDIR/project/<project_name>/, runs pixi install, and runs verification (optional):

./scripts/create-workdir-from-host.sh --help
./scripts/create-workdir-from-host.sh \
  --image your-pixi-image:tag \
  --project-dir /path/to/project \
  --resources-dir /path/to/resources \
  --container-workdir-path /tmp/workdir \
  --verify-run -- python -c 'import yourpkg; print("ok")'

2b) From an existing container project dir

If the project directory already exists in a running container, create /workdir in that container and copy it back to the host:

./scripts/create-workdir-from-container.sh --help
./scripts/create-workdir-from-container.sh \
  --container-id <CONTAINER_ID> \
  --project-path-in-container /path/to/project \
  --container-workdir-path /tmp/workdir \
  --verify-task smoke

3) Create the deliverable WORKDIR/product/

./tmp/pixi-offline-work/helpers/make-archive-ready-product.sh --help
./tmp/pixi-offline-work/helpers/make-archive-ready-product.sh \
  --workdir ./tmp/pixi-offline-work --project-name <project_name>

4) Final verification (offline product)

Verify the product (not the staged project) in an offline/no-network container. This is the final verification step.

./scripts/final-verify-product.sh --help
./scripts/final-verify-product.sh \
  --image your-pixi-image:tag \
  --product-dir ./tmp/pixi-offline-work/product \
  --out-dir ./tmp/pixi-offline-work/out \
  --project-name <project_name> \
  --verify-run -- python -c 'import yourpkg; print("ok")'

If this passes with networking disabled, it demonstrates that pixi install is satisfied by product/pkg-cache/.

After WORKDIR/product/ is created and verified, the remaining steps (packing, transferring, extracting, and running in the air-gapped environment) are the user’s responsibility.

Pitfalls / Notes

• Offline meaning: if “offline” means “no network”, prove it by running ./bootstrap-project.sh and then pixi run ... with --network none.
• Secrets: staging matters—don’t accidentally package .env, credentials, SSH keys, or tokens.
• Multiple Pixi envs: verify/package the environment(s) you actually need.

Future automation (not implemented here)

When you want this to be push-button, add a small orchestrator that:

• stages with consistent excludes
• runs the container build/verify
• emits a manifest (image digest, pixi version, lockfile hash)
• wraps the scripts/ in a single command